We wanted a CO2 detector for the cold room at the brewery and the Inkbird was a great more affordable alternative. I turned on a CO2 line next to it to check the alarm which is why you see the high number in the picture. It’s not quite as loud as your average home smoke detector but you can hear it from outside the insulated room which has two AC units going. The battery life appears to be about one day so it’s best to keep it plugged.

Glad to have this safety alert now in case of a CO2 leak.

Ordered this for my basement brewery to warn me about CO2 leaks. Temperature read 10F too high for the first few hours, perhaps due to heat generated while charging the battery? In any case, it seems accurate (+/- 1F) now. The CO2 sensor is quite sensitive and seems plenty accurate for my application. It is sensitive enough to detect the CO2 level rising if you stand near it for a couple of minutes and I was surprised how much higher (from ~460 ppm to 650ppm) the concentration rose while I was cooking dinner last night. To test the alarm function I rigged up a one gallon jug, some random tubing and gas connectors, and a syringe of C02. Adding 7-8 milliliters of C02 to the one gallon jug (initially at ~460ppm) bumped the CO2 concentration inside to ~2400ppm, which is well within the margin of error for this setup (one ml CO2 should raise the CO2 concentration of one gallon of air by ~260ppm).

Happy to add this to the other Inkbird products in my brewery.

Addendum:
I have had this now for several days in my (basement) brewery. After venting the CO2 in my pressurized conical fermenter, it was nice to be able to check that the CO2 level was still well within the safe level (~600ppm) and then returned to normal within a few hours. Very happy with the purchase.

OK, first off at the price point DO NOT expect Garrett level detection and discrimination and be realistic that this will take fine tuning and practice to get a feel for where it can shine and where it lacks. From my testing with it so far it seems to be right around where my Bounty Hunter performs and that is what I would expect for this detector. I tested several items at several depths and in short it does discriminate fairly well and usually does a fairly good job of approximately identifying what you're hitting at depth of 4" or less, once you go deeper it starts to fumble the IDs pretty hard and at 8"+ it starts fumbling even detecting. I did everything from modern US pocket change, morgan silvers, actual roman era denarii, 10k gold ring, and 14k 10" gold bracelet along with trash like nails, cut up aluminum can, and bottle caps. If there is a lot of trash or the trash is bigger than the item it struggles. But if the item is lone it's pretty accurate. All in all at the price, it performs along my level of expectation. If you have a Garrett budget or bigger go better but if you have a small budget I don't think you will be disappointed with this!

This metal detector is an excellent entry level for those who approach this type of activity for the first time, it is very simple to use intuitive in the instrumentation with three knobs the instructions are in Italian that explain in addition to the assembly also how to plumb a ground and there are the various adjustments of the knobs for the various types of metal. Highly recommended

Excellent entry level Metal Detector, it works well and even detects small fragments of metal, very light and convenient to carry.

In my case, the two 9-volt batteries were not included.

CO detector has a stand and shows CO level, green light, temp, and humidity. We set it up and after a couple days it started beeping as it was not plugged in. Not sure of accuracy of CO, but temp and humidity seem correct.

I really like this CO2 detector. It has a big digital readout on its front. You can tell the exact CO2 readings in the room along with humidity. It also has a battery icon on its face showing the amount of power left in the charge. It is charged using a USB cable, which is included. It took about an hour to recharge. I am not sure how long the charge lasts, but so far I have had it running a week without any issues. I also purchased this detector because I want to take it when we travel. With the recent deaths due to CO2 poisoning, I decided this little unit is perfect to put in our rental unit.

This monitor works well and is easy to use! When compared to my other Co2 detector it matched well, and when brought outside it reported 410 which is expected, so I was very happy with that!

The only downside is the battery could last longer for my personal liking, but is adequate especially seeing it uses USB for power which is very flexible. Overall I would suggest this to anyone!